Definition: You are given a question on college medicine. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: Which of the following statements identifies a chemically based sensory system?
I. Gustatory system
II. Auditory system
III. Olfactory system
(A)I only (B)II only (C)III only (D)I and III only

D